There are numerous synonyms for the phrase "clear off", which generally implies the act of removing or moving away from something or someone. Some of the other commonly used terms that can substitute for "clear off" include "move out", "leave", "depart", "go away", "withdraw", "retreat", "vacate", "evacuate", "disperse", "scram", "beat it", and "make oneself scarce". Each of these terms can be used in a variety of situations, whether it's asking someone to leave a premises or telling someone to remove themselves from a particular situation. The specific phrase chosen may depend on factors such as formality, tone, and context.